Trump: I'd do 'pretty severe stuff' to terrorists' families

Donald Trump said Wednesday night that not only would he make life miserable for terrorists as president, he'd show no mercy to their families.

In a live interview before 15,000 attendees at an Arizona rally, Trump told Fox News' Bill O'Reilly he would not hesitate to retaliate against people who have allowed family members to attack innocent Americans.

"I'm not going to assassinate them … I would do pretty severe stuff as far as I'm concerned," Trump said, with the crowd cheering at the response.